Cosmograil

Bonvin, V.; Chan, J. H. H.; Millon, M.; Rojas, Karina; Courbin, F.; Chen, Geoff C. F.; Fassnacht, C. D.; Paic, E.; Tewes, M.; Chao, D. C. Y.; Chijani, M.; Gilman, Daniel; Gilmore, K.; Williams, Peter; Buckley-Geer, E.; Frieman, Joshua A.; Marshall, Phil; Suyu, S. H.; Treu, Tommaso; Hempel, A.; Kim, S.; Lachaume, R.; Rabus, M.; Anguita, T.; Meylan, G.; Motta, V.; Magain, Pierre

doi:10.1051/0004-6361/201833287

Cited by 74 publications

(92 citation statements)

References 81 publications

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“…The Keck AO imaging data are part of the Stronglensing High Angular Resolution Programme (SHARP; Fassnacht et al in preparation), which aims to study the nature of dark matter using high-resolution AO imaging (e.g., Lagattuta et al 2010Lagattuta et al , 2012Vegetti et al 2012;Hsueh et al 2016Hsueh et al , 2017Hsueh et al , 2018Spingola et al 2018). The time delay measurements are provided by the COSMOGRAIL group (e.g., Courbin et al 2005;Vuissoz et al 2007Vuissoz et al , 2008Courbin et al 2011;Tewes et al 2013a,b;Rathna Kumar et al 2013;Bonvin et al 2017Bonvin et al , 2018, which aims to provide the highestprecision measurements of time delays. The lens environment of RXJ 1131−1231 and HE 0435−1223 studies are provided by the H0LiCOW team (Suyu et al 2014;Sluse et al 2017;Rusu et al 2017).…”

Section: Lens Modeling With Adaptive Optics Datamentioning

confidence: 99%

“…Tonry (1998) measured the stellar velocity dispersion of the lensing galaxy to be σ = 281 ± 25 km s −1 . The time delays of this system were measured by Bonvin et al (2018) with ∼ 8.5% uncertainties.…”

Section: The Samplementioning

confidence: 99%

“…Note that it also wasn't applied in previous H0LiCOW work to infer the final H0 measurement. A more detailed description of this effect and how to estimate the probability distribution of the microlensing time-delay effect (MTDE) can be found in Bonvin et al (2018). We briefly summarize the technique here.…”

Section: Microlensing Time-delay Prediction Modelsmentioning

confidence: 99%

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A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging

Chen

Fassnacht

Suyu

et al. 2019

Monthly Notices of the Royal Astronomical Society

195

167

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We present the measurement of the Hubble Constant, H 0 , with three strong gravitational lens systems. We describe a blind analysis of both PG 1115+080 and HE 0435−1223 as well as an extension of our previous analysis of RXJ 1131−1231. For each lens, we combine new adaptive optics (AO) imaging from the Keck Telescope, obtained as part of the SHARP AO effort, with Hubble Space Telescope (HST ) imaging, velocity dispersion measurements, and a description of the line-of-sight mass distribution to build an accurate and precise lens mass model. This mass model is then combined with the COSMOGRAIL measured time delays in these systems to determine H 0 . We do both an AO-only and an AO+HST analysis of the systems and find that AO and HST results are consistent. After unblinding, the AO-only analysis gives H 0 = 82.8 +9.4 −8.3 km s −1 Mpc −1 for PG 1115+080, H 0 = 70.1 +5.3 −4.5 km s −1 Mpc −1 for HE 0435−1223, and H 0 = 77.0 +4.0 −4.6 km s −1 Mpc −1 for RXJ 1131−1231. The joint AOonly result for the three lenses is H 0 = 75.6 +3.2 −3.3 km s −1 Mpc −1 . The joint result of the AO+HST analysis for the three lenses is H 0 = 76.8 +2.6−2.6 km s −1 Mpc −1 . All of the above results assume a flat Λ cold dark matter cosmology with a uniform prior on Ω m in [0.05, 0.5] and H 0 in [0, 150] km s −1 Mpc −1 . This work is a collaboration of the SHARP and H0LiCOW teams, and shows that AO data can be used as the high-resolution imaging component in lens-based measurements of H 0 . The full time-delay cosmography results from a total of six strongly lensed systems are presented in a companion paper.

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Section: Lens Modeling With Adaptive Optics Datamentioning

confidence: 99%

Section: The Samplementioning

confidence: 99%

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A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging

Chen

Fassnacht

Suyu

et al. 2019

Monthly Notices of the Royal Astronomical Society

195

167

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“…Microlensing due to stars in lensing galaxies, which we will discuss in more detail later, add additional variability to the light curve, making the robust measurement even more challenging. As a result, reliable measurements of quasar time delays require ∼ 10 yr monitoring observations, and the resulting accuracy on time delay measurements is on the order of ∼ 1 day (e.g., [227][228][229]).…”

Section: Time Delay Cosmographymentioning

confidence: 99%

Strong gravitational lensing of explosive transients

2019

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Recent rapid progress in time domain surveys makes it possible to detect various types of explosive transients in the Universe in large numbers, some of which will be gravitationally lensed into multiple images. Although a large number of strongly lensed distant galaxies and quasars have already been discovered, strong lensing of explosive transients opens up new applications, including improved measurements of cosmological parameters, powerful probes of small scale structure of the Universe, and new observational tests of dark matter scenarios, thanks to their rapidly evolving light curves as well as their compact sizes. In particular, the compactness of these transient events indicates that the wave optics effect plays an important role in some cases, which can lead to totally new applications of these lensing events. Recently we have witnessed first discoveries of strongly lensed supernovae, and strong lensing events of other types of explosive transients such as gamma-ray bursts, fast radio bursts, and gravitational waves from compact binary mergers are expected to be observed soon. In this review article, we summarize the current state of research on strong gravitational lensing of explosive transients and discuss future prospects.

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“…Analysis of strong lenses has led to constraints on the masses and properties of dark matter halos of galaxies (e.g., Keeton et al 1998;Koopmans et al 2006;Treu et al 2006Treu et al , 2010Barnabè et al 2009;Auger et al 2010;Lagattuta et al 2012;Wong et al 2014), substructure in galaxy halos (e.g., Mao & Schneider 1998;Metcalf & Madau 2001;Dalal & Kochanek 2002;Hezaveh et al 2016;Vegetti & Vogelsberger 2014), and the Hubble constant, independent of the cosmic distance ladder (e.g., Refsdal 1964; Keeton & Kochanek 1997;Kochanek 2003;Saha et al 2006;Oguri 2007;Suyu et al 2010Suyu et al , 2013Suyu et al , 2016Birrer et al 2016;Bonvin et al 2016;Chen et al 2016;Wong et al 2016). Strong lensing may also be employed to constrain the properties of dark energy (e.g.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Environmental and Line-of-sight Effects in Models of Strong Gravitational Lens Systems

McCully

Keeton

Wong

et al. 2017

ApJ

120

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Matter near a gravitational lens galaxy or projected along the line of sight (LOS) can affect strong lensing observables by more than contemporary measurement errors. We simulate lens fields with realistic threedimensional mass configurations (self-consistently including voids), and then fit mock lensing observables with increasingly complex lens models to quantify biases and uncertainties associated with different ways of treating the lens environment (ENV) and LOS. We identify the combination of mass, projected offset, and redshift that determines the importance of a perturbing galaxy for lensing. Foreground structures have a stronger effect on the lens potential than background structures, due to nonlinear effects in the foreground and downweighting in the background. There is dramatic variation in the net strength of ENV/LOS effects across different lens fields; modeling fields individually yields stronger priors for H 0 than ray tracing through N-body simulations. Models that ignore mass outside the lens yield poor fits and biased results. Adding external shear can account for tidal stretching from galaxies at redshifts  z z lens , but it requires corrections for external convergence and cannot reproduce nonlinear effects from foreground galaxies. Using the tidal approximation is reasonable for most perturbers as long as nonlinear redshift effects are included. Even then, the scatter in H 0 is limited by the lens profile degeneracy. Asymmetric image configurations produced by highly elliptical lens galaxies are less sensitive to the lens profile degeneracy, so they offer appealing targets for precision lensing analyses in future surveys like LSST and Euclid.

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Cosmograil

Cited by 74 publications

References 81 publications

A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging

A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging

Strong gravitational lensing of explosive transients

Quantifying Environmental and Line-of-sight Effects in Models of Strong Gravitational Lens Systems

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